I thought this project might be interesting to you guys:



Sononym - Machine-Learning Powered Sample Browser

Short introduction video on youtube
https://www.youtube.com/watch?v=VfKin1n_YaA

"Serious about using samples for music production or sound design"

It does 100% automatic tagging/categorization of your sounds, and works completely offline too.
It can even find samples from a recording that you've just made (using sound to find sound - a.k.a. similarity search).

Works with OS X 10.9 or newer, free trial available from the website:
https://www.sononym.net/